Steam temperature gauge



FIG. 1 is a top front perspective view of a steam temperature gauge, showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right-side elevation view thereof; and,

FIG. 7 is a left-side elevation view thereof.

The broken lines shown in the drawings depict portions of the steam temperature gauge that form no part of the claimed design. 

CLAIM The ornamental design for a steam temperature gauge, as shown and described. 